1,599 research outputs found

    ENSURING THE COMPETITIVENESS ORGANIZATIONS USING SERVICES BASED ON KNOWLEDGE MANAGEMENTITLE

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    Using knowledge-based management is a very modern approach to specific activities of service organizations, with direct effects on work processes to ensure competitiveness. The complex system of multidisciplinary actions refers to the particularities of services for tertiary sector in relation to material goods production, which involves the transfer to practice of the original methodologies of decision making in conditions of risk and uncertainty.competitiveness, knowledge, competition, awareness, certification, computerization.

    Memory effects in non-interacting mesoscopic transport

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    Consider a quantum dot coupled to two semi-infinite one-dimensional leads at thermal equilibrium. We turn on adiabatically a bias between the leads such that there exists exactly one discrete eigenvalue both at the beginning and at the end of the switching procedure. It is shown that the expectation on the final bound state strongly depends on the history of the switching procedure. On the contrary, the contribution to the final steady-state corresponding to the continuous spectrum has no memory, and only depends on the initial and final values of the bias.Comment: 17 pages, submitte

    Metastable states when the Fermi Golden Rule constant vanishes

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    Resonances appearing by perturbation of embedded non-degenerate eigenvalues are studied in the case when the Fermi Golden Rule constant vanishes. Under appropriate smoothness properties for the resolvent of the unperturbed Hamiltonian, it is proved that the first order Rayleigh-Schr\"odinger expansion exists. The corresponding metastable states are constructed using this truncated expansion. We show that their exponential decay law has both the decay rate and the error term of order ε4\varepsilon^4, where ε\varepsilon is the perturbation strength.Comment: To appear in Commun. Math. Phy

    Robust persistence and permanence of polynomial and power law dynamical systems

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    A persistent dynamical system in R>0d\mathbb{R}^d_{> 0} is one whose solutions have positive lower bounds for large tt, while a permanent dynamical system in R>0d\mathbb{R}^d_{> 0} is one whose solutions have uniform upper and lower bounds for large tt. These properties have important applications for the study of mathematical models in biochemistry, cell biology, and ecology. Inspired by reaction network theory, we define a class of polynomial dynamical systems called tropically endotactic. We show that two-dimensional tropically endotactic polynomial dynamical systems are permanent, irrespective of the values of (possibly time-dependent) parameters in these systems. These results generalize the permanence of two-dimensional reversible, weakly reversible, and endotactic mass action systems.Comment: 26 pages, 11 figures. Version 3 clarifies some explanations and adds a detailed calculation to an example which clarifies how the result can be applie

    Independent electrons model for open quantum systems: Landauer-Buettiker formula and strict positivity of the entropy production

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    A general argument leading from the formula for currents through an open noninteracting mesoscopic system given by the theory of non-equilibrium steady states (NESS) to the Landauer-Buettiker formula is pointed out. Time reversal symmetry is not assumed. As a consequence it follows that, as far as the system has a nontrivial scattering theory and the reservoirs have different temperatures and/or chemical potentials, the entropy production is strictly positive.Comment: 12 pages. Submitted for publication in J. Math. Phys. on 2006-06-05. Revision and extension of: G. Nenciu, A general proof of Landauer-Buettiker formula, [math-ph/0603030

    Magneto-optical imaging of magnetic deflagration in Mn12-Acetate

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    For the first time, the morphology and dynamics of spin avalanches in Mn12-Acetate crystals using magneto-optical imaging has been explored. We observe an inhomogeneous relaxation of the magnetization, the spins reversing first at one edge of the crystal and a few milliseconds later at the other end. Our data fit well with the theory of magnetic deflagration, demonstrating that very slow deflagration rates can be obtained, which makes new types of experiments possible.Comment: 5 two-column pages, 3 figures, EPL styl

    INNOVATION PERFORMANCE FACTOR OF ECONOMIC ENTITIES

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    Innovation is the base of economic growth and there for it must be sustained with research and development. The economic enterprises to survive on market, they must became competitive and generate performances there for they have to be innovative. In Romania the innovative entities are unevenly distributed and in time the number of them has growth. There for in this work the inovative entities are treated from the standpoint of economic regions (macroregions 1, 2, 3, 4), years (2002-2006) and economic activity or branchinnovation, performance, economic entities, development, research, economic regions

    Faraday effect revisited: sum rules and convergence issues

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    This is the third paper of a series revisiting the Faraday effect. The question of the absolute convergence of the sums over the band indices entering the Verdet constant is considered. In general, sum rules and traces per unit volume play an important role in solid state physics, and they give rise to certain convergence problems widely ignored by physicists. We give a complete answer in the case of smooth potentials and formulate an open problem related to less regular perturbations.Comment: Dedicated to the memory of our late friend Pierre Duclos. Accepted for publication in Journal of Physics A: Mathematical and Theoretical

    A novel application of deep learning with image cropping: a smart city use case for flood monitoring

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    © 2020, The Author(s). Event monitoring is an essential application of Smart City platforms. Real-time monitoring of gully and drainage blockage is an important part of flood monitoring applications. Building viable IoT sensors for detecting blockage is a complex task due to the limitations of deploying such sensors in situ. Image classification with deep learning is a potential alternative solution. However, there are no image datasets of gullies and drainages. We were faced with such challenges as part of developing a flood monitoring application in a European Union-funded project. To address these issues, we propose a novel image classification approach based on deep learning with an IoT-enabled camera to monitor gullies and drainages. This approach utilises deep learning to develop an effective image classification model to classify blockage images into different class labels based on the severity. In order to handle the complexity of video-based images, and subsequent poor classification accuracy of the model, we have carried out experiments with the removal of image edges by applying image cropping. The process of cropping in our proposed experimentation is aimed to concentrate only on the regions of interest within images, hence leaving out some proportion of image edges. An image dataset from crowd-sourced publicly accessible images has been curated to train and test the proposed model. For validation, model accuracies were compared considering model with and without image cropping. The cropping-based image classification showed improvement in the classification accuracy. This paper outlines the lessons from our experimentation that have a wider impact on many similar use cases involving IoT-based cameras as part of smart city event monitoring platforms
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